Key ring



FIG. 1 is a perspective view of a key ring showing my new design;

FIG. 2 is a top plan view thereof, the bottom plan view being a mirror image thereof;

FIG. 3 is a right elevational view thereof, the left elevational view being a mirror image thereof;

FIG. 4 is a front elevational view thereof; and

FIG. 5 is a rear elevational view thereof. 

The ornamental design for a key ring, as shown and described. 